Which role does the router ID (RID) have in the BGP route selection process?

Which role does the router ID (RID) have in the BGP route selection process?

A.
The router ID is evaluated immediately after MED to determine route preference

B.
The router ID is evaluated last in the route selection process

C.
The router ID is evaluated after the cluster length and a lower router ID is chosen

D.
The router ID is evaluated after analyzing the IGP metric cost

Explanation:
http://www.juniper.net/techpubs/en_US/junos10.0/information-products/topic-collections/nogbaseline/bgp-routes-and-selection-introduction.html